Company lists · Data refreshed October 2026

Top 13 Hvac design and engineering firms based in Dayton, United States

Name: Hvac design and engineering firms based in Dayton, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 14, 2026 27 companies tracked

RevenueBase identified 27 company matches for hvac design and engineering firms associated with Dayton, United States as of October 2026 and tracks 342 professional contacts across them, including 89 with verified work emails. Across the United States, New York is the largest hub for this category (199 companies); Dayton has 27.

This list covers company matches for hvac design and engineering firms associated with Dayton, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 14, 2026 How this list was built

27Companies

342Contacts tracked

89Verified emails

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The 13 largest hvac design and engineering firms based in Dayton, United States

Ranked by team size

Top 13 of 27 company matches for hvac design and engineering firms based in Dayton, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Applied Mechanical Systems, INC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	51-200	97 contacts →
	Exact match “Solid Experience, Innovative Technology, Customer Focus As a mechanical contractor specializing in HVAC and plumbing solutions, AMS brings a broad blend of expertise to…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
2	Frye Mechanical, INC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	51-200	15 contacts →
	Exact match “We are ready to serve you!” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
3	Envirocontrol Systems	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	11-50	11 contacts →
	Exact match “EnviroControl Systems designs, installs, and services commercial, institutional, and industrial HVACR mechanical systems, as well as building automation and temperature control…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
4	Pitco Engineering LLC	Exact match	Dayton, TN, United StatesHQ recorded Oct 14, 2026	11-50	10 contacts →
	Exact match “PITCO ENGINEERING aims to empower companies to enhance humanity's well-being through innovative engineering, both on Earth and beyond.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
5	Nauman & Zelinski LLC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	11-50	6 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
6	Butler Heating & AIR Conditioning	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	11-50	6 contacts →
	Exact match “Butler is proud to be Dayton owned & operated since 1949!” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
7	Thomas & Galbraith - Dayton	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	1-10	5 contacts →
	Exact match “Thomas & Galbraith Heating, Cooling & Plumbing is proud to enter the Dayton area!” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
8	L2 Engineering, LLC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	1-10	4 contacts →
	Exact match “L2 Engineering (L2e) delivers responsible consulting and design services to clients who require engineering assistance, technology integration, or a combination of both.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
9	Trane Dayton	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	51-200	3 contacts →
	Exact match “Trane Dayton keeps commercial buildings across the Dayton, Ohio region running efficiently, comfortably, and cost-effectively.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
10	CJH Mechanical INC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
11	Stan & Associates INC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	11-50	1 contacts →
	Exact match “STAN Engineers is a nationally experienced consulting engineering firm with a unique expertise in engineering design, energy conservation, and commissioning.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
12	Helmig Lienesch LLC	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	11-50	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
13	Bc&e Engineering	Exact match	Dayton, OH, United StatesHQ recorded Oct 14, 2026	1-10	1 contacts →
	Exact match “Building Commissioning & Energy Engineering LLC (BC & E) offers a variety of professional engineering services to suite the needs of today’s complex commercial building operations…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “hvac design and engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 13 of 27 hvac design and engineering firms based in Dayton, United States

See the full list, filter by size, metro and specialty, and access 89 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hvac design and engineering firms based in Dayton, United States at a glance

As of Oct 14, 2026

26.0%Verified-email coverage

12.7Average contacts per company

11-50Median size (employees)

Oct 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Dayton, so it is reported there. Company counts and contact totals on this page are exact for Dayton, over 27 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Dayton, United States whose business descriptions match “hvac design and engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 89 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 14, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Hvac design and engineering firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “hvac design and engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hvac design and engineering firms are there based in Dayton, United States?

RevenueBase identified 27 company matches for hvac design and engineering firms associated with Dayton, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Applied Mechanical Systems, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most hvac design and engineering firms?

New York leads the United States with 199 company records, followed by Houston (179) and Dallas (81). Dayton has 27.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 89 professional contacts with verified work emails tracked across these 27 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 14, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.